Ben I have everything Imperial ever made. And enough spares to paint whatever you want. Alternatively if there is a certain look you are after (i.e. not tourny 3 tone) I can drop whatever you need round to you whenever and you can abuse it with a brush.
Also if you need anything in previous marks I have it (so a bag of 2nd ed thunderbolts, 1st edition everything etc) if you want alternate pictures of anything. Sadly 1st ed Thudd guns and rapiers had marines modeled on, but if you really want them I can give you a couple to cut.
Ironically 1st ed is oft the best in terms of looks (well to me, and definately over 2nd ed), 2nd ed is the crappest looking and what I mostly had in mind and even what I actually use for mine

That bloody hellhound especially.
Oh you need the mortars still?
I use strip bases of 2 80mm mortars (ie two thin legs and a slightly thicker main tube), 2 loaders and 1 comms guy. I was thinking of doing some max base size chaps with 3 120mm mortars, 3 loaders, 3 lasguns (shame the 1st and 3rd ed guard don't mix as I have a bunch of rapier and taratuala guardsmen) and one comms and make it a bit prettier as the basic stand is rather bare (note how both fit in the 3-7 infantry models requirement, amassing eh?). All of course with gas masks.
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