Fork swop aprillia area 51

I'm thinking of swoping the front fork swing arm thingy on my '51. For conventional forks.
Anyone know what will fit?

 

Bump. Mite have found a answer here http://www.apriliaforum.com/forums/showthread.php?t=25845
What's your thoughts?

 

Bumping again! Sorry! Bloody link I had has gone! I'm thinking sr forks and stem will fit, I might loose some steering lock to lock but what do you guys think? Is the bearings and head stock the same?
Any help apriciated!

 

Found these pics, can anyone identify these forks??

 

Cool. I'm thinking that the sr yolk and forks will fit my '51. Same year same manufacturer, can't think aprilia would use a diffrent headstock/bearings ect?????