Try a search for Letter Templates images.
  1. aqua ditigal pixel pattern vector background template clipart. Royalty-free image # 402228
  2. aqua ditigal pixel pattern vector bottom background template clipart. Royalty-free image # 402182
  3. aqua ditigal pixel pattern vector top bottom background template clipart. Royalty-free image # 402140
  4. blue gradient pixel pattern vector bottom background template clipart. Royalty-free image # 402138
  5. blue gradient pixel pattern vector bottom right background template clipart. Royalty-free image # 402186
  6. blue gradient pixel pattern vector brochure letterhead bottom background template clipart. Royalty-free image # 402189
  7. blue gradient pixel pattern vector brochure letterhead bottom corner background template clipart. Royalty-free image # 402136
  8. blue gradient pixel pattern vector brochure letterhead top background template clipart. Royalty-free image # 402217
  9. blue pixel pattern vector background template clipart. Royalty-free image # 402233
  10. blue pixel pattern vector bottom corner background template clipart. Royalty-free image # 402266
  11. blue pixel pattern vector top corner background template clipart. Royalty-free image # 402193
  12. colorful polygon vector brochure letterhead document background template clipart. Royalty-free image # 402135
  13. dark blue gradient pixel pattern vector bottom background template clipart. Royalty-free image # 402221
  14. dark blue gradient pixel pattern vector bottom right background template clipart. Royalty-free image # 402210
  15. dark blue gradient pixel pattern vector top right background template clipart. Royalty-free image # 402198
  16. dark purple polygon vector brochure letterhead document background template clipart. Royalty-free image # 402194
  17. faded dark purple polygon vector brochure letterhead document background template clipart. Royalty-free image # 402254
  18. faded purple pink polygon vector brochure letterhead document background template clipart. Royalty-free image # 402246
  19. faded purple polygon vector brochure letterhead document background template clipart. Royalty-free image # 402214
  20. faded yellowish polygon vector brochure letterhead document background template clipart. Royalty-free image # 402160
  21. green ditigal pixel pattern vector background template clipart. Royalty-free image # 402120
  22. green ditigal pixel pattern vector bottom background template clipart. Royalty-free image # 402142
  23. green ditigal pixel pattern vector top bottom background template clipart. Royalty-free image # 402203
  24. green gradient pixel pattern vector bottom background template clipart. Royalty-free image # 402148
  25. green gradient pixel pattern vector bottom right background template clipart. Royalty-free image # 402199