Boyds has a real good reputation. Another thing to consider would be a "take-off" used stock, if the factory ever made a version with a high comb to suit your needs. A gunsmith named Calhoon, who converts alot of CZ527 to .19 wildcats, sells used barrels and stocks, from those he converts. Might be worth a checking out. Also, if you find what you need, and cannot get the seller to send it to the U.K, maybe think of having it sent to a trustworthy person here in the States, who could then send it to you, "gift", to avoid duty fee's
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Mark