There is also the ADDAC System 102 VC Radio. You can both scan and search manually or by voltage control. Everything on the module is under voltage control. Not only does it scan stations, it can search all of the glitchy sounds and fuzz in between as a noise source. ADDAC modules are very good quality.
-- bopodoq
Thank you for introducing me to another option. Had a look at it and it does look good - unfortunately at 60mm deep it will not be able to fit in my current case. May fit in what I hope to be my next case, I will have to check.