You can typically find transfer tape anywhere that you can find vinyl, some of my favorite places to source vinyl is:

GUANGDONG HEYI, a professional manufacturer and supplier of the self-adhesive vinyl, printable, heat transfer and other cutting materials for digital cutting,home & office décor, car & window decals, crafting and DIY, scrapbooking and card-making, embellishing & advertising, fashion and garment ornamenting, etc.

Heyi Industry and Trade always takes customer demand as the top priority.We take users and market demand as starting point. The company has a professional R & D and design team of more than 10 people to keep up with the development of the times, and continuously provide customers with new ideas, environment-friendly new materials, new technique and new products to meet the relevant customization needs from different customers.