I use www.jaycar.com.au for 2g/4g/8g cabling. (Walk in, cut to length, pay at counter, nice and easy, prices should be cheaper than the auto lekky you quoted above)
You would be hard pressed to get exactly the same colours as toyota loom, its not exactly standard issue anywhere and usually only supplied in gazillion metre rolls.
There are a limited number of colours and stripes available off the shelf. I got mine from www.alanco.com.au. The shop is in Welshpool.
If you want to use same colours your best option would be to cut from a toyota loom. (Crimp terminals for most connectors are available online)
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