I just made that repair myself. Fortunately the "rip" was just an un-threading and I did not need new parts.
After checking with several boat upholstery repair places all were too busy to make the repair in a timely manner. I ended up stitching it back by hand with a heavy needle, pliers and 100 lb test fishing line.
I started out with dental floss but found it not substantial enough.
Tedious and time consuming, it took about 4 total hours - but it worked.
Destinations on purpose: Canada: Alberta, BC, Nove Scotia, PEI, New Brunswick. USA: ME,NH,MA,VT,NY,MT,WY,MN,MI,WI,GA,VA,FL,UT,CA,OR,ID,CO,NV,AZ
:BLife is Good
2009 Jayco 1206
2011 Toyota Tundra