Thank you for bringing these to my attention, I will add them to my online monster list now.
The Pech I just flat out missed. I remember these little guys from the 1E MM2. Always happy to discover a 1E monster that got a 3.5 update.
With the Tooth Golem, I thought it was an existing creature: I think I was mixing it up with the Fang Golem (MM4) and/or Tooth Beast (ToM).