In archaeology, things on the surface of the ground rarely survive well. Most of our evidence comes from things dug into the soil, like the post holes dug to hold the beams that supported buildings' walls and roofs.

Early medieval smiths unfortunately seem to have usually worked up off the ground, so little of their workshops survive beyond ephemeral traces. We have the occasional hearth bottom, lots of hammerscale and slag, and plenty of tools, but no floor plans to my knowledge. We're not even sure if smiths had permanent workshops, or if they were itinerant, carrying their tools around from settlement to settlement in a boat or cart.

We're on firmer ground when it comes to tools, though. Early medieval people liked to place sacrificial offerings in buildings when they demolished them, and these often included hoards of tools. See especially the site reports from Bloodmoor Hill (England), Bishopstone (England), and Flixborough (England) - I can send you a scan of the tools found at Bloodmoor if you don't have access through a university library. We also have several early medieval burials, a little earlier than the 10th century, with ironworking tools (see especially Hinton's writeup of the smith buried at Tattershall Thorpe).

We've also discovered a chest full of 10th century tools in a bog at Mästermyr (Gotland); you can find line drawings of the tools on this website, and the full writeup here.

For more general reading, I would recommend Thomas Birch 2011, 'Living on the edge' (message me if you can't access it); he discusses the ephemeral nature of the smithing evidence in earlier Anglo-Saxon England (6-7th centuries), arguing that smiths' magical work required them to remain on the fringes of settlements, and his ideas help explain why even in the 10th century evidence for smiths' workshops may be so hard to find inside excavated settlements. Duncan Wright's 2010 article 'Tasting Misery among the snakes' (link to pdf) could also be useful - it discusses the question of itinerant smiths in England.