Awesome Charlie. That is the youtube I was thinking of, and while the brand is different the style of the gun is the same. And boots for these axles are usually quite stiff.
I know Astoria guns sell new for $250+ but they can usually be had via ebay for less. I know several folks who have purchased them for $150 to $180. And when you are done it will still be worth about the same. Kind of like Hazets......

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Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John