This is strange tho... that info was lifted off the profile website shop (crank spares) but i just went out to look in my box of bits, and i've a spacer tube here out of a mid bb set (it's black) which is only measuring 44mm
Is it a mid or us bb you're setting up?
PM me ur addy if you want this one, just in case, and i'll get it out to you tomorrow.
If it's a wee bit short you could add some washers inside the BB shell as well.
Brian