For a Compact VHF I would with the Standardhorizon HX 40 looks like the perfect size for my PFD
https://www.standardhorizon.com/indexVS.cfm?cmd=DisplayProducts&ProdCatID=85&encProdID=20019313550AEDB5EFAD8B429EEAEED3&DivisionID=3&isArchived=0