the lifter tool is nothing more than a round rod with a flat ground down the length of it. If someone could measure the OD of their lifter retainer tool and measure the distance across the flat to the round side we could make our own. It's a sweet tool to own, though I've never had a need to use one when swapping cams in my engines. Oh yeah, length of the tool would be nice, too.

Gabe, just pull the pushrods, rotate the crankshaft so that the cam alignment dot is either straight up or straight down, remove the timing chain and large sprocket, remove the cam retainer, reinstall the large sprocket, get your new cam lubed and ready to install, spin the cam in the engine round and round a few times so it pushes all the lifters up in their plastic retainer, pull the old cam out, slide the new cam in, install thrust retainer....

Edit...added Allen's comment about sprocket dot alignment