Brummel,
Mr Neil Miller (www.strop-shop.co.uk) makes superb paddle strops (www.strop-shop.co.uk/category/Hand_Made_Razor_Strops___Paddles/Paddle_Strops,b.html).
There is a fine choice of double sided leather, or leather/hard wool felt. The paddles are made from ash and also other hardwoods.
For pastes, I use his double sided tallow tan leather paddle, with CrOx on one side and tin oxide on the other.
Mr Miller also sells CrOx powder.
Have fun !
Best regards
Russ