You can get a mobile air con man to come and degass and later return to regass. once you have fitted new parts (in addition to the compressor usually and least a new drier and condenser see
https://speedyairspares.com.au/produ...yl-77-172.html etc).
Compressors around $350 e.g.
https://www.ebay.com.au/itm/Brand-Ne...sxd:rk:21:pf:0 or
https://www.ebay.com.au/itm/New-Air-...MsxS:rk:6:pf:0 This $300 may even fit
https://www.ebay.com.au/itm/Ford-AU-...rlm-:rk:2:pf:0
Buy the Haynes Tech Book
https://www.ebay.com.au/itm/Automoti...GZL3:rk:2:pf:0 and some O rings
https://www.ebay.com.au/itm/Automoti...GZL3:rk:2:pf:0 and oil to lubricate the O rings
https://www.ebay.com.au/itm/Air-Comp...yoq:rk:12:pf:0 and some crows foot flare nut spanners you can use to tighten all the pipe fittings to spec with a small torque wrench. This is what I usually do. If you are going to keep the car think about fitting one aftermarket line filters that stop broken bits of compressor getting into teh drier and condenser if it should fail again.
https://www.youtube.com/watch?v=Zu_mVy-cN-w and
https://www.ebay.com/itm/Supercool-I...Nh5:rk:14:pf:0 and
https://www.amazon.com/TSI-Supercool.../dp/B008PKUTYY and
https://www.amazon.com.au/s/ref=nb_s...In-Line+Filter