How tall is it including the loop at the top? https://size.name/en/catalog/brake_pads?length=96 finds some of the right shape, but they're 62mm tall. That appears to include the loop. Searching on the Blueprint part number ADT342125 brings up a series of matches: https://www.simplycarparts.co.uk/products/adt342125 and on the Toyota part number 04466-50100 leads to the Brembo part P 83 059: https://www.bremboparts.com/africa/en/catalogue/pad/P_83_059 which has a drawing. If I overlay that on your picture it looks a touch smaller but would maybe fit? Anyhow, someone is selling the Blueprint part on ebay for £9, so perhaps worth a punt?

Was hoping CHAT GPT might be able to find them but keeps going back to standard OEM pads which do not fit.

Also, while you've got it that far, maybe take the discs off and measure those too? Then you'll have the information forthe future, when you need them!

Low mileage £4,500 onco

Digging around suggests that Sumitomo is a supplier to Toyota, so it's possible those are OEM pads, or they could be aftermarket. It seems that Advics is a consortium of Toyota, Denso, Sumitomo and Aisin, and they make both OEM and aftermarket parts. They have a Japanese website: 株式会社アドヴィックスセールス ADVICS SALES CO.,LTD.株式会社アドヴィックスセールス ADVICS SALES CO.,LTD.ブレーキパッド、ディスクローター、ホイールシリンダーなどのブレーキ部品を販売する「株式会社アドヴィックスセールス」。自動車用ブレーキシステム・パーツの開発・製造を手掛けるアドヴィックスグループのアフターマーケット事業を担う会社として、世界のお客様により良い商品とサービスを提供します。and it could be worth poking around there looking for clues. At the very least measurements off the existing pad may give you something to go on.

Yeah - plan to take Exisiting Pads out and measure them etc - Good idea outlining with a pencil 👌