where can i get a RH taillight assembly for 2006 freelander ,

wait for it!!

could try this:

Land Rover Freelander R/H rear light unit XFB500140 on eBay (end time 12-Dec-10 08:11:00 GMT)

or this:

LAND ROVER FREELANDER 06> REAR LIGHT R/H on eBay (end time 15-Dec-10 11:57:57 GMT)

maybe not this: (on the grounds of taste)

RDX Rear lamp/lights Freelander 1 2003 to 2006 Td4/V6 on eBay (end time 19-Dec-10 07:52:51 GMT)

finally this:

2006 LANDROVER FREELANDER DRIVERS SIDE REAR LIGHT on eBay (end time 11-Dec-10 11:57:45 GMT)

or you could try paddocks, craddocks and so on

now not really so hard was it, quick search for "freelander rear light" revealed all of those on ebay. Years ago, when I was an apprentice, someone said "there are none so blind as those that will not see". In this case, there are none so blind as those that cannot be arsed.