It's been a while,i spent 2 years with my 250cc out of action but she rides again - someone forgot to gap the rings

Anyway, since I've been riding her again, my desire to improve the handling has once again become a priority. It's still on the Monza Jr 160cc forks and wheels, my intention was always to build some 18" alloy rimmed wheels, with a twin leading shoe front hub and some 35mm forks. Over a period of time I've acquired some 35mm Marzocchi forks, only to realise once I had them that they have no post to react the brake plate from, and that they're rather longer than the currently fitted set (about 745mm vs 650mm), this leads me to believe they were from a trials bike or similar?!? Has anyone modified forks to add a brake lug on, and is swapping out the stanchions and springs an option to make these usable or should I move them on and start again?
I also have collected some 18" Akront rims
1.85"-18" 36-TR-582-E Front
2.15"-18" 36-TC-189 Rear
Which I was hoping to fit to a new front hub with twin leading shoes, I had collected a twin leading shoe brake plate (I was led to believe it was from a Honda 175 (SL?? Perhaps), but I bought a Honda hub for it and it didn't match) but am struggling to find a suitable hub for it in the UK. Does anyone have any recommendations on how to ID the brake plate or where I might source a whole hub? I'm concerned about how to adapt the speedo drive to my original speedo too?
Cheers for the help
Keep the rubber side down!