Magnets for Model Couplers?

[Green_Elite_Cab]

Basically, are there magnets strong enough to hold HO model trains together?

I wanted scratch build a particular type of coupler, but it doesn't have a "knuckle". I have several trains of Multiple Unit cars, which use a special type of coupler that makes most of the MU connections all at once (rather than having to have all the lines hooked up manually like on a regular locomotive). It basically looks like a peg and a slot side by side, and they slip into each-other, guiding all the connections into alignment.

This way of coupling cars may even allow me to "model" this prototype action by hooking up all the wheel pickups together, if i could make the pegs and slots metal and isolate them. The problem is, without a knuckle that physically holds the train together, how do i get these couplers to hold?

I was thinking magnets might be the answer. The pins would act like the prototype and keep the couplers lined up, but the magnets would be what holds the cars together. The question is, do they make magnets strong enough to hold two or three passenger cars together?

Here is a prototype photo of an Arrow III MU coupler. Can this be done?