Not sure which yellow it is, but Triumph has the
paint codes listed on their website. Once you get the right code, I hear you can take it to a paint distributor and get some made up in an aerosol can. That'd be your best bet to get a sure match anyway.
You might check with Brent and see what he's done. On his site for the low profile seat, there's a bumble bee Speedmaster with a yellow seat bolt, and yellow clamps on the intake rubbers that looks like a close match. Don't know if that's his bike though, but I know he has a yellow Speedmaster. Sometimes he'll use other people's pics of their bikes on his site.
