Is this the druid you are looking for?
PS: Link above is a forum member (and sponsor) on here.... PM him and he might give you a forum discount. 
Yeh I looked up OEM&M already

. There's lots out there to choose from, ranging quite considerably in price (and also quality I'm sure!); Anywhere from £20 up to £80.
I've spotted a good price on a 'Topran' sensor, and a pretty reasonable price on a 'HAAS' one too.
Budget is very much a consideration, the purse strings are pulled very tight at the moment
