Most door companies stock what you are looking for.

I had heard that how2girl. I am trying to do some more research on 2016 statistics for WA. It looks like most hardwoods are naturally resistant to white-ant and apparently they don't like MDF much because of the glue content. The data and statistics that I have found so far seem to be from 1995 & 2004. We did look in to this before we decided to manufacture the architraves and MDF was the better option. We do offer timber though as well.

About your question about sourcing some of your own internal fittings. It is best you discuss this with the builder early on. Usually, the builder's contract will specify an allowance for particular fixtures. However, some may specify actual brand and model of fittings ie taps, toilets, sinks, etc in their quote, and they may or may not allow you to vary this. IF you are happy with those specified fixtures and you think the allowance amount is reasonable, then you can go with it. Otherwise, any changes or variances need to be discussed with builder, and it is very important this be discussed upfront and before any contract is signed. Some building contracts may also disallow some variances. In any event, carefully read the contract so you completely understand what you are agreeing to, and discuss any and all parts where you are not in agreement so these issues can be ironed out. Also, and this is my own experience and opinion, but I advise specifying in the contract the completion date AND if the build is not completed on time then what happens (consider that you may be paying interest on your mortgage, be financing a bridging mortgage, etc. and/or you may also have already sold your home and then have to pay rent until the build is finished). If you are in agreement with builder to source some of the internal fittings yourself, there are any number of suppliers and sources to investigate, and this might be a good way to keep your budget in check. There will be Houzzers who are experienced at this and can provide you with ideas. Just keep in mind that you will have to have all fittings READY and ON SITE when the tradesmen require them, otherwise you will be holding up the build and that is going to cost YOU money.

Thanks everyone! It is kinda tricky because we want the screen/security on the outside so as not to "ruin" the nice look. But so far those that have come to quote said it can only be done inside. Which does defeat the purpose of having beautiful doors. We'll keep googling and calling!