In my opinion I have tried positive LED headlight bulbs from Dynamo regulator conversions, and consider them to be the best available, the pattern is okay and are much brighter, the ones from PG are not so good.
My tail light unit came from Beck Electronics in Holland, this is not a bulb but a plate which after taking out the bulb socket wire went straight into the hole but I'm not sure if he is still doing them now.
TJohn