Which part numbers correspond to these bits?

[GOTHIK]

These are from J-27 Tow Vehicle, Thumper towed gun, trailer, and boxes [20-741], but I need a couple more of these particular pieces:

Would you please provide the part number(s) I would need to order more.  Thanks!

ALSO!  are there any "satellite dish" bits available?  if so, what are their part numbers?

Thank you in advance for your help with this!

[CranstonSnord]

For the box, I'd say 20-741CRB  J-27 Thumper Tow Vehicle cargo bin.
For the gun base, it might be 20-741H  J-27 Thumper Tow Vehicle gun, but you might be better served emailing IWM and telling them exactly the bits you want.
Radar dishes:  20-804WPS  CRB-27 Crab weapons
20-743C  Mobile Headquarters radar sprue

[cavingjan]

It helps to send a picture and cicle the parts you need.

[GOTHIK]

Thanks for the help, guys.

[JadeHellbringer]

It helps to send a picture and cicle the parts you need.

This. Something to remember is that as awesome as the Officewench is, she isn't a Battletech player. If you e-mail her and tell her you need an LB-10X for a Summoner, she has no idea what you mean. Tell her the miniature's stock number, and she can help more- part number if possible helps a ton too. If you don't have it, the image you have above of the bits means she can look and say "ok, this stock number, and the parts that look like these... got it"

Alternatively, I've used photos of the assembled miniature from CSO and used MS Paint to put a circle over the part I'm looking for- that seems to work pretty well too if you don't have images of the actual parts available like the above one. (Ordering a 'butt plate' for a Fire Moth, for example, it was easier to get a photo of the mini and circle what I needed. The results were... amusing. :P )

[Jal Phoenix]

For a radar dish, the Swift Wind scout car can get you a really nice on, that comes both opened and closed.