I believe Teague Custom Marine has one.

Get Real sells direct..they have a great cap as it has integrated cooling and uses ARP Hardware. Check them out.

i have 2000 baja boss 272 (approx 4600 lbs) bravo one lasted 35 hrs after procharger installed on 502 w/merlin heads,sheared gear off in floor,had 28 pitch 4 blade,plan on needing to buy at least x/r outdrive or upgrade yours w/max machine worxx parts,no way around it unles you really baby it,Smitty

2001 Nordic Heat
ProCharged 540 gernaded X drive to smithereens.
Now running an XR with Max machine upper shaft, bearings, spanner nut and top cap for 1 year plus with no problems (knock on wood