Weird allen bolt hunt - Tune Starkes seatpost

Hey, as I am a cack handed twat I managed to round the titanium bolt that came on my Tune seatpost, and googling has been unsuccessful in trying to find a replacement that isn't part of the 75 Euro official replacement.

Can anyone help? I've managed to replace it for now with a regular m5 bolt, but I want to sell it (as I fucking hate it) - I paid £30, would anyone like it for that posted?

It's silver, 31.6mm

Possibly. Picture?

That might even test the mighty clerkenwell screws. Well worth popping down to them though.

Cap head in the drill and file it as you spin it?

My god, that might actually work. Easiest fix seems to be to use one of those conical washers from a brake pad I think, but I love the idea of setting up a tiny lathe.

@phildas pic below. Cut to 350.

(I suspect the reason I had issues is because I installed it backwards I think. I'm going to try it on the turbo tonight and if it stays still I'll keep it but if not I'm in the market for a 31.6 or 27.2 inline post).

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Right, got a Thomson now so if you're interested in the tune @PhilDAS let me know. Both bolts fucked but it's working with regular m5.

Has it got no logos? Both the ones I’ve had have got the logo on the side where this one appears blank

Logo on one side, I'll take a better photo tomorrow. I think I had it backwards which was the issue.

Ah yeah you can see the angle on that cross piece that goes through it

Be interested in the bolts with a round head, depending on the diameter of the round bit as a bodge for a headlamp.

Yeah, seems obvious now.