Thanks Ann. I have just ordered some LPD from Freestyle, as part of a larger order. I'll probably get some Agfa MCP to try it with. Freestyle didn't have the Tetanal developer that Adrian recommended, and paper is rather expensive to ship.
I still have a few boxes of MGIV left, so I'll probably just use that for other projects.
By the way, what is the lifespan of the working solution (1:1) of LPD?