Update:
Because people have asked- the following company is who I purchased the airsoft M49A2 round from. Be advised that CBP seemed to think it was an actual round that was an improper demil and wanted to drill a hole in it. It took quite a bit of explaining to convince them otherwise.
If you should decide to order one of these airsoft props, couple lessons learned:
1) Make sure the shipper disassembles it at least into separate fuze, tail, and body pieces.
2) Make sure the shipper clearly labels it as AIRSOFT...because CBP seemed to think that the words "inert" and "replica" meant it is a real and dangerous weapon, or can readily be converted to such. They, including whoever the bomb squad "expert" was, do not have a thorough understanding of mortar rounds requiring a lift charge (in the case of the M49A2, a lift charge that hasn't been made or available in years), or a detonator that is not present, or that these lack a safety setback fuze...or any number of other issues. They wanted me to provide an ATF Form 6 for release of a toy.
3) DON'T LET THE SHIPPER SEND IT VIA FRAKING AIR MAIL!!!!! Bad things will happen. Seriously...
And now...the company that sells these fine airsoft props:
Svoboda (which according to Jenzilla apparently means "Freedom" in Russian...) Airsoft