help on changing capacitors

Hello every one I need advice...I have a balanced audio technology vk-5i preamplifier that needs to change the output capacitors they are rated 1mfd at 400vdc this use to be made by Jensen but they are no longer in business, I contacted Bat but they asked more than 450 us for changing them, can you recommend a substitute and what brand should I buy?
Best Regards
Albert Saadia