This one of Rob Paisley's circuits is the one I was thinking of:
http://www.circuitous.ca/556Stall08.html
You can't just crank up the power supply voltage to put all the LEDs in series with the Tortoise, but the circuit can drive 200ma, and as shown with 2.2k resistors, each LED set in parallel is about 5ma. Plus the Tortoise at 15ma (so you can easily put 2 Torti on one output for a crossover). 4 LED sets plus 2 Torti would be no more than 60ma, well within the rating of each output. Even 4 Torti for a double crossover would only make it 100ma, half the max rating.
This does require DIY assembly - Rob hasn't updated the details on his older circuits, but he does list complete kits with the PCB and all parts. Each unit controls 4 - 4 sets of pushbuttons, so 4 individual turnouts and/or crossovers.
With the recent rise of inexpensive PCB houses, a nicer board (with labels and solder mask) can be made more cheaply, even factoring in using express shipping. I'm not sure how well delivery to Canada works, I've done 4 different boards now and I get them less than a week from the time I submit the order, and there are no customs issues. I know some countries do run into issues with ordering from these Chinese PCB places and their shipper of choice (they use DHL - I've NEVER had a problem with them in the US). If you're wondering how you would get such a board - it's a simple circuit and it probably wouldn't take me more than an hour or so to generate it. And the company I use, JLCPCB, also itegrates with their supply arm, LCSC, so you can order the parts from them all in one order. Only thing I've found is they have a somewhat limited choice of pushbuttons, so I had to order those from Mouser to get the ones with LEDs built in.
--Randy
Modeling the Reading Railroad in the 1950's
Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.