Help with couplers

[jagould2000]

Just received a new 4-4-0 American and four Jackson Sharp Open-Sided Excursion cars. (Yes - I'm building Disney World). The engine seems to have a slightly different coupler than the cars and keeps disconnecting.

Can anyone point me in the right direction for a part to replace the couple on the engine to match the cars? Or perhaps magnetic couplers to replace all of them?

I'd rather make the changes to the engine as its about to be reworked anyway to match the Roy O Disney (WDW RR).

If you want to see pictures for reference, go to http://www.helloiamjonathan.com/?q=model_blog

Thanks!