Good luck finding something actually designed for British Pennies. Whitman made folders (9680, 9681, 9683, and 9684) for British Pennies back in the 60's, so even finding used ones can be a problem (and these are folders not albums). I use 2x2s intended for US Half Dollars.
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Chief Coin Supplies
P.O. Box 254
Oshkosh WI 54903-0254
920-231-6161
A self-addressed stamped envelope will get you a price list.