Complete from the US, box, vintage look and all. https://www.ebay.it/itm/Seitz-Jeweling-tool-set-with-reamers-pushers-anvils/274079345666
about £300, maybe use a reshipper to lessen customs charges.
I have nothing against the Chinese, it's just that in this case their value proposition is not that compelling.
In this case the difference is not 1:10. A Seitz before stakes and punches is £290 + VAT https://www.cousinsuk.com/product/seitz-jewelling-tool-with-spindle
Maybe you can get the needed one as you go. Or bite the bullet for the complete set at £875 + VAT.
And I'm sure there are deals on Ebay if patient.