As noted, Elaire Corp. makes collets which are compatible w/ the Carbide Compact Router/Makita RT0701/0700.
For a different collet system you would need to get a different tool completely.
One option is a router which uses a different system such as our ER-11 Carbide Compact Router:
or you could do a complete spindle upgrade:
There are other options — I do so many test cuts that some days it felt as if I was spending more time wrenching than the machine was cutting, so I went for a spindle w/ a quick change mechanism, the Mafell FM 1000 WS (which is available re-badged under a different name, and similar units are available from AMB/Kress):