Got it mounted.
After checking with Coventrys and another store which didn't have it, I did it the "old fashion" way.
As the bolts that I had where to thick, I viled off a bit till it ran smoothly in the track, up-side-down with a bigger washer.
After done all 4, I fitted them, drilled a new hole in the aluminium awning holder and done.
Will take a picture soon.