This one is based on the classic design by Doc Emmett Brown but with several modifications and upgrades given the advancements in technology since 1985. Mine doesn't run on Plutonium which is somewhat difficult to obtain. Instead, it uses lasers to excite a refined Dilithium crystal which creates the high frequency, high current electromagnetic field necessary to capture the time domain eddy currents accurately.
Here's a photo testing the response of the Dilithium crystal...

And a close-up of the crystal..

I'm using Hughes Industrial HeNe laser tubes for the top two primary exciter beams..

I'll be using vacuum tubes for some of the control circuits mainly due to the fact that they are somewhat immune to electromagnetic pulses which are generated during time travel and can easily fry semiconductors. Four of these vacuum tubes can be seen to the right of the lower exciter rod here. Obviously they aren't doing anything just yet..

The exciter rod drivers are also vacuum tube based. There's three of them, one at the base of each exciter rod..

Here's a closer shot of the exciter rods and Dilithium crystal. I'm testing the lower one with my RGB laser here but it will use a fixed colour laser for the final build..

One more shot of the Dilithium crystal and exciter rods in action..

Apparently, Jaycar Electronics here in Australia sell Flux Capacitors when stock is available in their warehouse. However, it is designed for automotive use rather than fixed installations and it is prohibitively expensive. The one I am building will cost me next to nothing because I already have the parts.
Here's the listing on their website..
https://www.jaycar.com.au/flux-capacitor/p/OUTATIME
Stay tuned for more updates as I continue this build.