Google the rogue trooper xbox game. There are shots of pillboxes there.
I was given set a few weeks back. Having them all the same number is a pain in the arse as they were individually number and deployed in large numbers too. Another example of mongoose magic in respect to being faithful to the IP.
Anyway you can convert the numbers easily with a chisle blade into a 5, 3, 7, etc.. (again a bit of thought moongoose could have done them as 88 allowing loads of number combos).
I've also coverted a number if mine further by cutting off the middle two tubes so it looks like it's just deloying.
Nice sculpts just a few issues with a lack of thought from mongoose.
(I'll be painting mine soon then I'll post in my Rogue thread)
Good luck.