Nellie,
I have a Grace frame, Z44. I ordered mine through JoAnn's on line. They had the best price I'd found anywhere at the time. Beware of the UPS though. My frame took the scenic route before it was delivered! It was worth the wait though.
The Grace company replaced a couple of pieces that were damaged very, very quickly. The instructions for assembly were very clear and easy to follow. The Grace company is very consumer friendly!