Several years ago, Jim Barrett had an article in OGR magazine where he discussed how to remove Lionel uncoupling magnets from their original track sections and cutting out a small section of Gargraves track and inserting them there. The magnets blended in well once installed and worked well. I used them on my last switching layout. The article reran at least one more time more recently. The old track sections with the magnets can be found on eBay rather inexpensively, I think I bought 40 for around $20 back around 2001. You can also find them at local train shows.
Tom
