I'm presently doing a detailing job on an LGB Matra crane and needed some working pulley blocks and shackles (see picture). A Google search found these guys www.cornwallmodelboats.co.uk in Tintagel. They stock an incredibly large range of fittings for model boats (no suprise there really) that could also be used for model railway projects. I ordered on Sunday evening via their website and my order arrived on Tuesday.

 

For those interested in battery remote control - maybe useful too.