Good luck getting a manufacturer to stand behind components used in racing!
Does the rollbar come with an injury disclaimer?
Taken from Simpson catalog: (as an example)
Motorsports are dangerous. No warranty or representation is made as to the products ability to protect the user from any injury or death. The user assumes that risk...."
Check out anybody's catalog, and chances are you'll see the same wording.
If you want a welded in rollcage, you'll have to contact TC Kline (assuming that he has re-established a relation with a suitable fabricator).
1957 Austin-Healey 100/6 Wine Red
1961 McCulloch R1 go-kart Screaming Yellow
1995///M3 Coupe Dakar Yellow Eurosport Twinscrew S/C
1999///M Rdstr Cosmos Black Eurosport Twinscrew S/C
1999///M Coupe Estoril Blue Eurosport Twinscrew S/C
2001///M Rdstr Steel Gray
2011 X5 35i Sport Deep Sea Blue/Cinnamon