Incentive to recruit B2B customers for generative interviews

Together with my team need to recruit participants to run some generative interviews, 15 in total. We have a customer base, but we're not sure if we should offer them an incentive and what kind could be. The relationship between this segment of users (businesses from small to large sizes) and our company, happens mostly through customer assistants, so this will be our first approach to them as part of the UXR team. We have some budget but it is not too much, so it would be nice to hear any suggestions or a similar experience. Thank you!