imo real lace boots usually made on pleather. i recommend applying angelus finisher to seal it.When I kitbashed customs many years ago, I used some that were similar to these:
https://www.ebay.com/itm/2338707853...nqOhmVCylq2P4JFDI0nPCUD3dpQ=|tkp:BFBM3oi1y5Fj
https://www.ebay.com/itm/2761981318...LbmUXwM63Kvp9peRJXoxR1iQ==|tkp:Bk9SR5KuyMuRYw
https://www.ebay.com/itm/3862499303...ap7UIfaeHGx6M6BjlFVEPTu2hg==|tkp:BFBMkq7Iy5Fj
The taller ones seem more screen accurate, though I actually used some more like the first link.
These don't have the zipper on the side but this is more or less in line with what they wore.