I think the main reason most people go for an aftermarket BOV is the OEM unit is configured to cope with more limited standard boost of ~0.9bar. Also, they will be at least 15 years old now so wear and tear become a factor.
I'm using a secondhand Forge recirculating BOV in my race spec ST205 so it won't be as noisy as the type that vent to atmosphere.
As you can see my BOV is located mid-way between the FMIC and the throttle body although it's currently venting to atmosphere until I get the reecirc plumbing installed. I don't think it makes any difference where it's positioned along this pipe. It's function is simply to dump excess air from the compressor/intercooler off-throttle before it hits the throttle plate thus preventing compressor stall so position shouldn't be critical.
The Forge unit is quite a common upgrade and parts are easy to get. Unlike the OEM unit you can dismantle it for servicing etc. There are other makes available which are a similar design.
I presume the Toyosports kit you have is this one?
http://www.toyosports.co.uk/fmic-toyota ... -634-p.aspWhilst clocking of the compressor may improve air flow into the intercooler and improve the aesthetics there are plenty of examples where this hasn't been done. As a matter of interest does the Toyosports kit come supplied with pipes for a non-clocked compressor? It's not clear on their website.