Right, I've got to the bottom of it.
Yours is called Tago (although there is one called Tanco just to confuse everyone), and here's the site with them all (which you've probably seen) - https://www.toymania.com/334archives/tomland/tago.htm
No sold listings but reading from the above site he's from the Space People line and not Space Raiders. Well I've learnt something at least so thanks for putting him up and hope you find an answer from someone.
Ian