valve train options

Here's a beauty! I've got a 360 block .30 over stock .30 over dish pistons, that might change, comp cam xe262 w/ matching springs and lifters. New balancer water oil pump, bearings etc. The heads, well thats the fun part, sent them to the shop and had them taken down .55 to stay alive, and had the intake matched as well. It's gol darn hard to find an adj 273 valve train, so I suppose my only other options are to have custom push rods or shim the rocker towers! Not really what I want to do shimming. Is there another option maybe something after market??