As you state we do not make the Elgar anymore, nor do we have anything similar to it in our current range.
We have the following recommendations for your father.
Always go to a good retailer and lie on a selection of beds to compare comfort and support. Only you can judge what is right for you. Look for a combination of firm core support to hold your spine in correct alignment, with plenty of top layers creating a nice, soft sleeping surface.
Don’t head for the nearest orthopaedic bed – it may be too hard for you. Older people may have more back problems, but they also have more sensitive joints.
Choose a bed with high lines. It will be easier to get in and out of. A firmer bed is better for the same reasons and also for anyone who spends any length of time sitting up in bed. Similarly, a firm base – solid top, firm edge or one of the firmer spring edge bases, will feel safer to anyone regularly sitting or leaning on the edge of a bed.
A soft sleeping surface makes for a warmer bed – it gives better insulation. Even firm beds can have softly quilted surfaces.
Beds with adjustable neck, foot, head and leg rests are now readily available – good for anyone who has to spend a lot of time in bed or has high blood pressure or rheumatism.