I suggest you DON'T go there personally unless you KNOW that your parts are in stock. I called in once (just passing) and had expected to buy a couple of things like a hugger and some heel guards and none were in stock.

I have had loads of stuff from David over the years and have never had any problems but I've never had it delivered.

On two occasions I arranged to collect stuff at the NEC and once at the Ally Pally show. Also KP in Aylesbury used to get me stuff.