No you're not alone. seems like there's a DNS issue with the domain.
you should be able to poke around google caches of their site if you want, just google for ahsupply and the name of the part you want for details, when it's found in the search, just choose the link for the cached version.
from one such page, their contact info -
A H Supply
1150 University Ave., Suite 5
Rochester, NY 14607
9am-5pm Mon-Fri
Phone: 585-473-8680
Fax: 585-473-9422
just give em a call.