The bases I used can be found here: https://www.covepalms.com/
Specifically the Fursuit Ref and Planti Party packs.

TERMS AND CONDITIONS:
✨ Buyer will be emailed the hi-res files (with both backgrounds and transparent versions). There's quite a few files. You can use whichever ones you like.
✨ Buyer may change the design as much as they like. I will not personally do edits, apologies. Buyer may do whatever they like with the character.
✨ Buyer may resell, trade, gift, or share ownership of the character with someone else. I just ask that you not "flip" the character, aka resell for a profit, right after buying the design. You may sell for more at least 3 months after owning it unless you've gotten more art of the character, then you may price as you like.
✨ No refunds. All sales are final.