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You never made is clear what is wrong with your Profoto D1. With no modifier on it, it should provide a fairly contrasty light, and there is no practical way you can match or improve on the power output for your exposure over a strobe, except going towards a more powerful strobe.
If you want more contrast, you need the source to appear smaller to the subject. One way might be to move the D1 further away from the subject, and then focus its light toward the subject to keep a similar exposure. With the D1, you may need to add the dome accessory to allow the light to be properly focused, and then add a reflector like the standard 7 inch reflector, set to focus the light into a beam. Or, if your D1 is not bright enough when pulled back and focused, go for a higher power strobe. Profoto has heads up to 2400 watt seconds.
If you are lacking contrast in your current setup with it that close, it could be the wide beam of the D1 with no modifier reflecting off off other surfaces in the area of the shot, and acting like fill light. A real Profoto snoot, or an improvised way to limit spill and only allow a narrow beam to reach the subject may increase contrast.
And as others have mentioned, most copy type of photography goes for balanced dual lighting from two light sources angled in from two sides to lower specular reflections and fill shadows in, with an effect of making the lighting look like very low constrast. But without knowing what you are really trying to do, it is hard to advise. In any case if you want similar lighting level to your 500 watt second D1 strobe, you need to stay with a strobe, because there is no way any continuous light can match it unless you can take your exposure up to many seconds.