My '79 Honda CBX 1000 Candy Glory Red colour could be close to what you want.
Even Honda don't have paint codes for their 70's bikes, whilst officially Candy Glory Red they never defined what that colour was!
Folks in the US have done extensive testing to recreate those colours (Red plus the 1979 Silver) through Colorite (they have a website) and created codes. R-101C-U is Candy Glory Red, NH-101M-U is Perseus Silver Metallic and NH-1 is Black. When repainting Candy Glory Red, remember that Honda used a silver base coat under this. Code for the silver base is MA1075.
I image Laverda is the same - if it looks good then carry on.
My red over black (or is it black over red?) Jota looks similar to the BMW red/black misty scheme but every red/black Jota was painted individually by eye and all differ! Some in fact look totally different - Monday and Friday bikes.
The bottom line could be to go Grant's route, find a protected area of whatever you have and try to get it professionally matched.
Richard