Question Panel with Proxy streams

[Zanzibar]

My ISP provider provides 1200 multicast channels but it allows to open and watch only 10 channels at a time. I can offer to my clients all 1200 channels, but since there are never more than 10 clients watching at the same time on the LB there is no problem. Using normal streams is impossible because only the first 10 will become active. I cannot use on-demand streams because these multicast channels have no prebuffer data and on-demand fires too late. Currently I use a panel which name I cannot mention in this forum (don't know why) that allows me to include all 1200 channels and open / close them instantly when clients switch channels.

My question is, is there another panel with the same function? If not, could this function be included in XUI? I'm ready to pay for an open source solution.

Thanks