I would use an Allmakes.
Get it from

Best prices on Land Rover & Range Rover parts and Accessories

And you may survive with your wallet intact.

You don't need a Bosch unless you like being poor.
Nor do you need a Landrover OEM - which is probably $500

If you want to vaporize money - send me some.
I'll help you spend it.

 

Got the issue fixed. It the the coil packs and a couple of the plug wires were going bad on the inside. The plug wires were magnacor and appeared fine from the outside. I even sprayed them and had no sparking. When I hooked them up to a multi meter, bingo.

All is well....for now.

Thanks to all who helped and gave advise. specially DiscoMike for some helpful advise with troubleshooting.