Wheelchair Accessible Whale Watching tours

Hello, I would really appreciate some help please. I am in a wheelchair and I am booked on a cruise on Sapphire Princess to the Canary Islands with my mum in April next year. We are stopping off in Madeira on the way to the Canary Islands and after doing some research discovered that Madeira is quite a good place to see whales so I would like if possible to book a wheelchair accessible whale watching tour and therefore my reason for posting is to ask if anyone knows of any companies that offer such a service. I have also posted this message on the Canary Islands board and also the Disabled Cruise Travel board so as many people as possible see my message.

Thank you.