The Fortis Group brand has traditionally focused on speedway sponsorship, but recently terminated its two-year tie-up with the Poole Pirates speedway team to find national sponsorship properties more relevant to its customers.
Rias also plans to expand its activity from direct mail to include direct-response TV.
The agency search, which is being handled by the AAR, is scheduled to conclude by the end of January.
A Rias spokesman said: 'We have grown rapidly over recent years and now have more than 1m policies, so we are looking at sponsorship opportunities that are more in line with our core customer base. Speedway is not the most practical way of communicating our brand to the over-50s.'
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