Sarcochilus are very cool plants. Compact with lots of flowers and color for the size. Your countryman Scott Barries (Barrita Orchids) work with reds and yellow and oranges is quite spectacular (in my humble).
I’m curious about the scale thing. I have periodic breakouts. I douse with alcohol spray and use the yellow sticky traps and they never “take over.” How did yours get out of control?Had a couple of hartmannii in the past. Lovely plants, free flowering and pretty. Unfortunately had to chuck them when scale took over.
Still not the easiest to find; Sarcochilus fitzgeraldii and hartmannii seem to be the only examples over here. A shame because the genus has some great diversity in flower shape and colour.
If all else fails in getting the temp low enough perhaps try an ice cube or two in the pots each night. I find that an extra burst of light (about as much as they will tolerate) in late Autumn (sorry Fall for you guys) into Winter helps to initiate spiking. As always keep an eye on the roots and leaves to be sure they are happy with the conditions.I have several plants that are growing like weeds, but i have yet to get them to bloom. I can't seem to get them cool enough for long enough to initiate bloom.