I need a better tender for my Spectrum Locos running as SP. They only come as coal burners with Rapido couplers.

Can the tender from this unit be ordered from parts?

N Scale - Steam Locomotives
Item No: 58157
Name: Northern 4-8-4 &
Roadname: TM
Description: With operating headlight.

It's maybe unsuitable electrically as Standard version but I may be able to move the spectrum trucks. buss bars, and draw bar.

I had the best decoder installed in our tiny club to install a decoder in this loco. When it was finished it was finished. The decoder works but there's some condition internally that requires you push down on the boiler to get it to run. Since the headlight is blown too it's hard to determine if the mechanism is binding or there is an open contact.

Help! Where do I start?