Buy spent catalysts

Our company, privately owned Ukrainian manufacturer of ferroalloys, is looking for a stable supplier of spent molybdenum catalysts (spent hydro-treating and desulphurization catalysts for oil and gas).
We are also interested in off-grade materials with low molybdenum contents (5-40% Mo).
Our demand is about 100 MT per month.
If you obtain the abovementioned materials and you don not need them for your own manufacturing we kindly buy them from you.
Your prompt answer will be appreciated with great honour.