Has anybody used U S CAR TOOLS

These guys do frame connectors and found them on a fabo discussion, i want connectors for my 1970 duster. Can,t seem to get them to answer the phone and when they did i was told they were out of my desired part to call back in a week. Well the week is come and gone and still no answer on the phone, i can leave a message and they still don't return the call. Any headsup would be nice. Are these guys real or what. I don't want to cut my floor pans to install connectors and theirs welded to the contour of the floor without cutting anything. Thanks a bunch. Steve