Straight end links - roll type

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I managed to score a pair of NOS 735 straight end links.
05f918a6871244c83896b9b393b35120.jpg

They are the roll type, with a 10mm void that fits an 1171 or similar bracelet.

Now I'm on the hunt for something of similar type with an 8mm void, to suit a 1447 type bracelet.

Can't seem to find a spec for one. Does such a thing exist? I also have 660s, which are a square section, but the void is about 10.5mm. Is there a 660-like version with an 8mm void?

These are both 20mm, but if a 22 exists with the 8mm void, they could be modified.

Cheers,
A