If you want to stick with EPDM (you probably should),
http://www.mcmaster.com/ has an EPDM o-ring kit (not as complete as the
harbor freight kit, so double check the size range you need) and every
individual size (assuming you can find the ASA size number or exact
dimensions).

Steve

Thanks Guys.

Yes, the link with the picture of the clamps looks right. I can get the
exact dimensions if anybody needs them.

One clamp broke at the hinge and both broke at the locking clip. It occurred
to me after I bought the $55 pipe kit that I could merely place a
conventional hose clamp over the two halves of the original clamp. The
reason I decided not to go that route was that it seemed likely that if the
material was so brittle that it broke when removing the clip, it may well
split elsewhere under high coolant pressure. I had this picture of my wife's
shapely legs in my mind with second degree burns from scalding due to a
coolant breach. Pissed as I was that the clamp was not available separately,
$55 seemed like a reasonable expense for the safety.

I also thought briefly about using a tie-wrap (plastic tie) over the broken
hose clamp. Again did not do this for safety reasons. I've seen many of the
old Nylon plastic ties that get brittle with exposure to heat. Perhaps there
is a different material available for the plastic ties but nylon is the most
common material used.

When I interned as part of my engineering training, I spent a term in a
military contractor's reliability testing lab.Taught me many lessons in
safety and common sense that applied outside of the lab.

Bob 'Oppie' Oppenheimer