You cannot find a MOSFET with that exact rating, because transistors can be used with all voltages inside of their specific limits. Most MOSFETs can be used with way higher voltages than 5V.
What you need is a logic level MOSFET, which means, that it will be in saturation (aka being fully ON) at the typical logic level of 5V on its gate. In the datasheet of a MOSFET you will find a diagram which shows the drain current depending on the gate-source voltage. At your logic level (5V in this case) you want the curve approaching a plateau.
Another important value is
R_DS(on). That is the resistance of the MOSFET when its on. The lower the resistance, the lower will the power lost to heat.
I also noticed that they have a heatsink, which mean that they need to dissipate heat, and are therefore not power efficient (which i do not like).
Every MOSFET dissipates some energy as heat, since no MOSFET can have
R_DS(on) of zero. The typical heat sink flap is meant to dissipate the heat for keeping the MOSFETs temperature in the specified range, even when drawing the maximum specified current. The datasheet of a MOSFET has a section with maximum ratings. There you should see the maximum drain current
I_D with its corresponding needed temperatures. For example have a look at this datasheet of a random logic level MOSFET from mouser. There is no specification of how hot the case gets with a specific current, since this depends on the suroundings, but the datasheet states, that it will support up to 80A, when you keep the case to a temperature of 25°C.
It also states what electrical power it can dissipate with its package:
P_D. You should look at how much current you need for your LED filament. You can calculate the dissipating power with
P = R * I² (P being power, R the resistance R_DS(on) and I the current through the MOSFET).