Is there any paste compareable but cheaper than oxygens' mag 44 paste?

Different ingredients, but similar concept: https://www.medvetpharm.com/gastro-plex-paste/

Gastro-Plex Paste is $11.95 per tube, or just shy of $6 per dose. 

If you purchase 4 tubes you get 1 free, so that takes the cost down to roughly $4.75 per dose.

Contains Gelatin which protects the stomach tissue lining/gut mucosa which in turn helps surpress the abrassiveness of gastric juices. Also contains Licorice which supports a natural inflammatory response for gastric health.  

Overall, it contains ingredients that protect and support the soft tissue lining of the stomach during times of stress, especially when your horse is producting excess stomach acid (result of adrenaline, etc). It also contains probiotics for gut health. 

Awesome thanks!