After the popular Nintendo Switch OLED deal. Pick up some cheap Switch accessories on clearance from Kmart. They are for the Nintendo Switch but from a quick search online they will fit the Nintendo Switch OLED too.
All items were in stock for delivery in VIC at time of listing and some items available as click and collect from my local Kmart.
Charging Case for Switch $5 (was $29)
https://www.ozbargain.com.au/node/710667
Clear case for Switch $1.50 (was $5)
https://www.kmart.com.au/product/clear-case-for-switch-43074…
Hard case for Switch $2 (was $10)
https://www.kmart.com.au/product/hard-case-for-switch-430998…
Silicone Grips for Switch Controller $1.00 (was $5)
Black - https://www.kmart.com.au/product/silicone-grips-for-switch-c…
Blue - https://www.kmart.com.au/product/silicone-grips-for-switch-c…
I'm pretty sure none of those case will fit the OLED Switch (excluding the Joy-Con Covers).