Maybe you could try calling in on your (ex-?) clients and trying to make up. I’d guess they weren’t thrilled to find their projects on your website, without their permission, and perhaps not crediting them? You would probably feel the same way yourself if the situation were reversed.
So you could try an “aplogy and of course I’ve removed”, then ask them if there was a way they’d be happy – like for example you make clear the client was x, producer was your client, you did just whatever you did – free extra publicity for them.
If they say no, you’ll just have to rely on describing your experience on the web, and perhaps using the sample files one-to-one in client meetings, but never publishing them … Or, better, creating yourself a cracking little 2 minute demo which shows off your very best ideas and work (free of client considerations) – an investment, for sure, but probably a good one if you have people who might want your services and want to see samples.