Awesome job on saving the 123/Danco and +1 on thanking your FIL for his service.
I pulled all the hoses off of my Kwik Way loader and dropped them off at my local mom & pop auto parts store and said "make me new ones". I didn't ask how much and ended up spending a little over $300 for about 8 hoses....ouch

They fit perfect and work great.
Here is where I go now for my stuff.
https://www.surpluscenter.com/
Keep us posted on the progress and don't forget to feed us pics. Good luck and have fun.