Yeah,
TOW has cast half stock caps. I have done several now, and I have copied the lines of the Lyman GPR.
One has a pipe, and the other does not. I prefer the pipeless for looks. Being as they are moderns, I used JG-Weld to attach the cap. The gap between the stock and the cap, I filled with Black Onyx chips, mixed with 1hr Epoxy. The resulting finish when sanded down looks good. It becomes a black stripe between the wood, and the cap. Once the stock is refinished, the cap can really shine with rubber wheels on a Foredom. With the polish, I prefer the pink rubber. Not mega fine, but fine enough. Cratex takes out the flap wheel marks.
I like the way the foreend caps look. The one I did from the Hawken shop, was a little easier, but I preferred the TOW ones.