Laminated glass can be cut down, but it may take more than one attempt, you will have to measure the front windscreen size first, as some Sprints had full size front screens (not sure if any of the Hawk cars did though), sounds like an interesting project for someone (you)
Good job i have a couple then! Didn't realise you could could get it cut down, thanks for that they were next on the list to go on ebay ha.
Luckily i sneakily measured the one at SMD and it was cut down by roughly 2 inches.
I should imagine that the Hawk shells are all roughly the same, but best to wait until you have the car (measure twice cut once!), the side glass can be cut out of toughened or laminated sheet, or you could go the perspex route, depends on if you want to make a road racer or GT Touring style car