Hello LIS
Sorry no link, I have a mate who is a HVAC supplier so I asked him to supply and fit it, the link below is to one I found on ebay, it looks to be the same as the one I have, $680.00 the cheapest option would be to go with a supplier / installer ( usually ) I think any of the modern inverter systems are likely to give good service. The little " portable " one from memory had a one speed fan and like Glen said they are LOUD!!
https://www.ebay.com.au/i/1528154750...85307089680294
Ed