[drywater]

I was able to match a swatch of original finish/stain (hidden underneath the galley bench) in my boat with Varathane dark walnut stain. Most people would think this would be too dark, but I did not let it soak in and the wood was sanded to 220 grit (which further prevents the wood from soaking in too much). You could also try Special Walnut, which is lighter, and build up the correct darkness in multiple coats.