I have combined my immersion pre-chiller with my counter-flow chiller.
The base is an old milk crate. Inside I have a cat litter bucket to hold ice water for pre-chilling the tap water which runs through the counter flow chiller sitting on top. I've attached wheels and a handle salvaged from an old garbage can. The handle is screwed onto an old plastic shelf board.
It may not look like much to you, but to me it's a thing of beauty! :-)