M.H.
There is a very nice lady in Crystal lake who will sew it for you. Her business is called Crazy About Sewing, she is just NW of the old downtown Crystal lake. Not far from Veterans park.
Diane Blythe, Crazy About Sewing, ###-###-####
I haven't had her make me a quilt, but I have bought fabric from her before and she is very friendly and honest.
If you attempt it yourself, I would use "easy knit", and iron it to the back of your pieces before sewing. You need an interfacing to stabilize the t-shirt material before sewing. You can buy it off the bolt from Joann's, they keep it by the cutting tables.