Daniel:
There are many manufacturers that can come up with a container head for you. Do you want only to handle two of the hooks ? or all four with a top mount. Do you want to mount attachment on forks ?
Do you need to handle both 20' and 40' containers ? Make sure that the V300 is big enough for your 48" load center....
If you need more help, give me a call or email me your number and I will walk you through this.