For a monk to gain reach, he can:
1) Take one of the feats that adds a polearm to his list of Monk weapons, Pole Fighter or Pole Master.
2) Take a Vile or Aberration feat that actually extends your innate reach.
3) Find a way to increase your size, typically via Enlarge Person (spell) or Expansion (Psi power)
4) The aforementioned Ring the Golden Bell will give him ranged use of his unarmed strikes, which is functionally equivalent to reach, but is limited in uses per day.
In addition, to maximize #of attacks for a Monk, I typically go for a Dex/Str/Wis build, ideally with Enlarge/Expansion, a polearm and delving deep into the Combat Reflexes feat tree. With that feat, plus Hold the Line, Stand Still, and Deft Opportunist, you'll get huge numbers of AoOs to work with.
Other PrCls for Monks to check out:
1) Shiba Protector gets Wis bonus to Att & damage, in addition to the Wis bonus to AC.
2) The Shou Disciple is an armored monk PrCl that actually requires no monk levels as a prereq- just the right combo of feats and so forth- and eventually gets to FoB with any weapon.
3) For this PC in particular, you should check out the Dragon Descendant (Dragon Magic)- a draconically themed martial artist PrCl.