Uhhh RadioShack maybe? I think the powered splitter I bought online was RadioShack brand. Other than that it’s a crap shoot, but you definitely want to check out some kinda electronics store for that (or just go online).

I use this one:

RadioShack 1500320 1-Input/4-Output https://www.amazon.com/RadioShack-4-Output-Component-Distribution-Amplifier/dp/B010EIK6K6/ref=sr_1_4?ie=UTF8&qid=1548337787

It has S-Video and RCA, and you can hook up to 4 other output sources to it. No latency that I can tell. This is a RadioShack brand one, but I'm not sure of the usual availability in stores. I've never seen it at any local Radioshack.