Thrift store and a can of paint.

EBay

Amazon

Michaels/Hobby Lobby/JoAnn's

Your local frame store

Bonnie, on ECS website they have 8 x 8 frames available. I know that you were asking for 6 x 6 but it looks like 8 x 8 is what they carry. I have bought frames from thrift shops-sometimes it is a frame with a cruddy pic in it, I pitch the pic and frame my stitching. Sometimes, I have been lucky at Hobby Lobby with clearance items. Sometimes, I have gone to Walmart and just used a 3 dollar frame and paint or not. Hope this gives you some ideas. I like your pattern. Maybe when you get it in a frame you could post a pic. Peace. Pam

123stitch.com has a 6x6 Mill Hill frame in Holiday Red. 😊