Why don't you want an LED tail light? They're much brighter and far more visible. And draw less power from your bikes aged charging system.
The digital tach/speedo units are all expensive. They have tons of internals, sensors, LCD screens etc. Try Speedhut and see if you can locate a unit you prefer. But the pricing will be similar.
Cheaper clip-ons might try Vortex. Dime City has them, as well as other vendors.