Here is a rare type (r5 in RIC) from Lyons, but the seller is asking 350.00 Euros.
Constantine I
A.D. 316
19x20mm 3.5gm
CONSTANTINVS A-VG; Laureate, cuirassed, holding spear across right shoulder, and shield on left arm.
SOLI INVIC-TO COMITI; Sol rad., raising r. hand, globe in l.; stg. l., chlamys across l. shoulder; in fields A/S.
in exergue PLG
RIC VII Lyons 60