Kevin will take care of you. I would suggest giving him a call and asking about the possibility of sending it back and having him put a couple additional vents on the mold to cure the issue.
I have 5 Del Mart 10" 2-cavity molds for sale. $22.50 each / $100 for all 5, plus shipping. Holler if you're interested...
pic here: 10 in. Mold
thanks,
I received some baits from California, a great guy in the Santa Barbara area. He sent me a Tru-Tungsten bait, I guess you would call it a "jerk shad" or something similar. He asked for the 4" LTS Shad in that color...here goes:
This might not help you due to the volume you ship, but USPS will ship you Priority mail boxes in any size you want for free. You don't pay a dime for them. It's worth checking it out at least to see if it will fit your needs....
Another suggestion would be to send your inquiry to BassMaster Magazine. They have a "What's it worth" section and when I read your post it reminded me exactly like something that would belong in that section. Give it a try....