Big butts are the norm in the world of fiberglass. Pac bay dl5/ul5 and Anglers workshop ADD reel seats will fit a .426 butt. For a little more coin many of the REC reel seats will work and they will bore out the wood to .438 for a couple extra pesos. With a little hand reaming Struble D8,, D1 and D3 will work also. If your feeling loose with your money the Bellinger dl720 will work and looks quite beautiful.

Those are some of the reel seats I've used on fiberglass blanks.