The problem comes from the lack of USCG models available. Aurora had a 1/72nd scale HH3F, but that company has gone the way of the dodo decades ago. Then there is the problem of accuracy. The only helicopter made for the USCG was the Aerospatiale 366G and only 96 airframes were made. The others were tag alongs to USAF or USN contracts or acceptance of "overage" airframes from the same. So there isn't a big USCG model kit inventory to work with.
An decent looking HH52 can be bashed from a 1/72nd scale SH2 or Sea King kit (Airfix makes one, and the price is right so you don't feel bad about cutting it up). Tail and main rotor heads can be kit bashed from the Revell H19 kit (These were the same on the HH52A anyway). Remove one inch of plastic from the fuselage, check your cut to be sure the rear part will mate well with the front after, cut open the new cabin door and there you are. The sponsons attached with a solid piece of plastic, and too many other picky points aside, you can have the lookof a 52 in the inventory. As for decals. . .
Don
I know it's only rock and roll, but I like it.