My AGA should arrive either tomorrow or the next day. I can see if my Phiniac tube fits at that time.
If it does fit, this is the tube mine is: clear naked tank is what Phiniac calls it. Mine is a 45mm length tube, which Phiniac calls their XL-v2. The colored tubes will NOT fit, as they are a wider diameter than the clear.
Not sure if the XL or standard tube will fit the AGA, depends upon the AGA's innards.