Thinking back 8 years ago when I tried to build a Foreplay pre-amp, the help I needed wasn't so much looking for answers as places to find them. Those of us with some experience shouldn't forget that.
I hope I'm not condescending but what I did, and you will be able to do, is go back to Digikey, look up the part parameters and search just a few. In the case of the 47uF cap: aluminum/radial/through-hole/47uF/450V/in-stock. Several choices, best being a Panasonic with the same lead spacing and overall length. Plus 8000 hours at 105 degrees C. A very good cap. Part number P13653-ND
The 470uF part #493-1269-ND is in stock.
Using the same method for the 'terminals', I went to connectors, quick-connect, then male/through-hole/.187 wide/.25 high/in-stock. Again, there were several, 2 with a 10 minimum quantity, part #1212-STK-ND
So theere you are, the parts you need and the method for finding substitutes, which if you stick with this as we all hope you do, you will use often.
Best,
Bill