How to locate replacement exterior trim online?

[TrevorB]

I have a couple of timber corner trims on the outside of the house (late 60's Fibro) that have rotted at the bottom and need replacement, but I can only seem to find standard right-angle corner trims. This house's corner trims look to be about 10mm thick and have a 45 degree cut where the 2 sides meet so it has 3 equal faces.

Does anyone know what these are known by and where I can get them?  I like this style much better than the generic 2-sided ones.

[R4addZ]

Hi @TrevorB 

Have you considered contacting someone like this company....

https://www.armourtimber.com.au/custom-milling.html

[Noyade]

More of an advertisement for Hikoki - than my woodworking skills.

Beautiful table saw.