"but the search function simply will not work for me."
I feel your pain about the search on irv2 not working. I belong to several other groups and am able to use their search boxes well but IRV2 does not like me
Here's my work around that usually gets me the info I need.
Open your favorite search engine and enter " COACH STEP, INC repair IRV2" the top 3 hits have the info your looking for.
So by adding irv2 to the query I get results from this site.