Wondered about the hill. Used to know a guy on 7th there.

My rear ARB was installed at Northshore.
Trouble-free.
Good mechanics (or they used to be!).

I used to have a come-along a long way back with a different smaller vehicle, and it would be a LOT of work to move a regular weight vehicle! But very handy if you get out on your own! I have and use the 48" high-lift alot. But keep the spring-pin system very clean! With the rocker skids, I lift one side of the rig at once, and rotate tires!
Parts are real hard to find because they just don't exist in Canada (other than the ARB), and the shops here are $$$y. We're a captive market!

Try BC4x4 website, it's probably the biggest locally, and there's lots of trucks there. But very, very few Mitsubishi's!
You're on the best Mitsu resource there is, right here.
Best bet is to ask for specific suggestions.
Since mine's a Montero (Raider), I don't know how much overlap there is between the 2 rigs.
With our front independent front suspensions, it's hard to get any lift other than by adjusting the torsion-bar resting position, and then getting the wheels re-aligned (or you chew up tires pretty fast!)
Look for CapnCrunch's recent list of mods he's done. It includes a lot of goodies , some of which may help you.
Your rear coil springs (if they're the same as the Montero) can be swapped for the GenII coils, and you gain a good rear lift.

We should do a coffee somewhere!