Where to buys some balljoints

I just bought a 1998 Discovery 300Tdi in Morocco and I'm taking advantage of a family trip to London to pick up some bits for it.

First thing are balljoints on the drag link and the track rod (they're shot - rubber hanging off them like spider's web).

Questions:
1. What's the best place to buy parts? It's got to be online or by phone for delivery. I'm here w/ kids and no car.

2. Looking on land-rover-parts-shop.com (ok place to buy parts?) the balljoints seem to come in two flavours - rh thread and lh thread. Am I correct to guess that I need a couple of each?

Thanks.

eBay for a selection of D1 parts suppliers with parts quality from pattern to OEM, u require three right hand and one left hand thread ball joint. Lemforder is a LR supplier.
The left hand thread is for the near side drag link ball joint.

Sorry, should have said thanks for that. Got the balljoints, and there they sit in the garage awaiting the proper moment...