??? Addon side panels or cumberbun ???

Does anyone know of a company that makes side panels or a cumberbun that can be added to a existing plate carrier. I have a 5.11 plate carrier with Protech level III 10x12 plates and level II soft inserts and am wanting to add sidepanels or a cumberbun rather cheaply for additional storage. Hopefully in black. Thaks

I’m not too familiar with the 5.11, but would something like this work?

http://www.tacticaltailor.com/platecarriersideupgrade.aspx

or this:

http://www.tacticaltailor.com/ibasidesapiplatecarrier.aspx

I believe both the cbun systems for the HSGI satch series and the DBT FAPC gen II are relatively universal