Allofill for over aggressive submental lipo?

I dont think this is a common procedure for defects given the efficiency of fat grafting.  However, if you are secure in your choice, my recommendation would be to call the company and ask for the local representative in the area.  They should be able to tell you their busiest provider.

From the research I've done the only advantage to the use of allofill is that it does not require harvesting fat in the way a fat transfer procedure does.
The correction of excess of liposuction will still remain as challenging to correct weather using fillers or fat transfer.
The problem is there is simply no tissue to put either fat transfer tissue,  or allofill.
What you describe is simply a very difficult condition to correct.
I'm personally very interested in understanding the occasional scar bands that form with neck liposuction.
I have a small following of patients I keep in touch with every few months to learn if these improve with time and or treatment options that have worked for them.
There often misdiagnosed as Patysmal bands which doctors often suggest treating with Botox or steroid injections which typically does not work.
My practice is devoted exclusively to liposuction and fat transfer procedures.
From time to time we get patients seeking second opinions with had bad outcomes from other providers.
I saw patient yesterday who had excessive liposuction done I've her chin and neck.
Perhaps not as bad that's what you described.
One idea that I've had but have not yet tried is to separate the skin from the underlying attached muscles surgically and placing a sheet of alloderm(cadaver skin with all cells removed leaving a collagen scaffolding.
If you have the time I would be highly appreciative if you would consider sending me a follow-up email in regards to how your treatment turns out and what you choose to do.
I'm trying to compile a small database what's worked and what hasn't to help future patients.
All the best,
Mats Hagstrom M.D.