(OP, I'm having handle... "issues")
I looked into getting just the gasket, online was under $1(but $7 S&H) but no place locally could find just the gasket alone w/out the plug.
I live in one of those special areas where ordering a part for a Honda can be difficult sometimes. In fact, the drain cock w/ gasket that I got, was considered a special order item, under the "HELP!" line of products or whatever.
As to squeezing the rad. hoze when it's up to temp. and pressure, I wouldn't do that personally. I realize that may help find a leak, but I don't trust my hoses or myself enough to do that
h: