seek a "custom chemical supplier"

i seek , a chemist or pharmaceutical or retailer who can supply me , a simple oxydo/reduce via permanganate of potassium from P-ephedrine , so pure methcathinone.

reference :
IUPAC Name: 2-methylamino-1-phenyl-propan-1-one
CAS Number 5650-44-2
Chemical Formula C10H13NO

i seeking legit and fiable supplier for methcathinone powder, for regular orders.
Only Serious factorys and prices please.

best regards