Assuming you want to run 31.8mm bars with a 1in quill, something like this would do the trick: https://www.aliexpress.com/item/1005004662534709.html
The same/similar stems are sold by a few retailers on eBay too: https://www.ebay.co.uk/itm/126048308469
This is pretty cool. I bought a shim from Condor on my way home today. For now, that'll get a stem and some bars on. I do think the classic look will be cleaner though.
I can vouch for this product... Ive had no problems running it with my njs frame
@JacqueLucque started
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Assuming you want to run 31.8mm bars with a 1in quill, something like this would do the trick: https://www.aliexpress.com/item/1005004662534709.html
The same/similar stems are sold by a few retailers on eBay too: https://www.ebay.co.uk/itm/126048308469