Seige Artillery would be great, and has been requested before in this Forum, but it comes back to the cost and so will have limited sales.
Consider that what we have been offered by K&C is field artillery, German only, we also onlty get a crew of 3, where in reality it was manned by 6 gunners. Britains does an 18 pounder, but with 4 gunners, and there is nothing else around in matte.
Yes there are some glossy 1/32 scale sets by smaller UK makers, but thats all.
What about other Allied arty, like French 75mm? or thier heavies?
What about German/Austrian Filed and seige?
Still very thin on the ground.
The only really good pieces came from Toy Army Workshop, but alas, the mould went 'down under, never to reappear.
Bear in mind that heavy arty, it heavy in the back pocket/credit card IF its done right, and that means a crew, so consider what a 9" siege gun with 10 gunners would cost, and ask if anyone is prepared to make it, and buy it?
By the way, I was lucky enough to get my TAW 8" Howitzer about 12 years ago, direct from TAW, where I arranged to obtain a full 10 man crew with souch hats, 54th (Aust) Siege Battery.
John