I’ve been Googling this for weeks and can’t find any 160mm long cranks with an ISIS drive interface. They are for the rear of an e-tandem with a Bosch motor. Easy to find short e-bike cranks but I need cranks with a spider for the timing chain ring.
[url=https://flic.kr/p/2mX3eZV]Tandem rear cranksBosch[/url] by englishjohn95, on Flickr

Crank Shortening

https://www.tartybikes.co.uk/cranks_pair/c514.html

ALLOY eCRANKS

https://www.bikester.co.uk/parts/e-bike-parts/e-bike-cranks-arms/

Thanks Paton but all the above seem to be E:bike cranks without the option for a chain ring. Tarty bikes link appears to be some sort of trials bike cranks with freewheel options and I can’t see any that take a chainring with lock ring……..A bit confusing TBH but the crank shortening option does look like a goer to me so I’ll probably investigate that one.