It looks old and obsolete so you would probably spend more on inserts than it's worth.
The most popular modern cutters use inserts like the AP** style and you can get them from many outlets. Search for something like "BAP300R 50-22-4" which would be a 50mm diameter cutter with 22mm arbor hole and 4 inserts AP**1135 or the "BAP400R etc" which take the larger AP**1604 inserts. I believe these are based on a Mitsubishi design but I may be wrong.
For steels you might go for coated APKT style and for loominum you might want uncoated APGT. You can get these on ebay, Aliexpress and other places closer to home such as APT Tools, who stock these and other modern types.
Murray
Edited By Muzzer on 06/02/2018 15:32:48