I have this modular paddle strop and it comes with one side of clear leather intended for pasting. I'd like to some 0.5 CrOx paste or diamond spray for basic maintenance , but can't find a decent vendor in the UK/EU.

The vendor who sold me the strop doesn't do 0.5, only 0.25. I'd have loved to get the SRD diamond spray but postage costs make it an impractical option.

Any suggestions?