I hope that someone will be able to help with a suppler for long round nose router bits for cutting foam. I have to cut 100mm polyurethane foam and I'm having a problem finding 1/2" (12.7mm) round nose with a cut of 100mm. I've found 1/4" cutters but feel they wouldn't be up to the job, the only 1/2" cutters I've found have a 6" cut which would be too long for my machine when cutting 100mm material.
Any help would be appreciated.